Physics, 11.06.2020 00:57 blairjaneaoyrfvp
A river flows due south with a speed of 2.0 m/s. A man steers a motorboat across the river. The river is 800 m wide.
A. In which direction should the motorboat head in order to reach a point on the opposite bank directly east from the starting point? (The boat's speed relative to the water is 4.2 m/s.)
B. What is the velocity of the boat relative to the earth?
C. How much time is required to cross the river?
Answers: 1
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Which one of the following terms is used to indicate the natural tendency of an object to remain at rest or in motion at a constant speed along a straight line? velocity acceleration equilibrium force inertia
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Estimate the kinetic energy of mars with respect to the sun as the sum of two terms, that due to its daily rotation about its axis, and that due to its yearly revolution about the sun. (assume mars is a uniform sphere with mass = 6.4ร10 to the power of 23 kg, radius = 3.4ร10 to the power of 6 m, rotation period = 24.7 hours, orbital period = 686 days and is 2.3ร10 to the power of 8 km from the sun.)
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A river flows due south with a speed of 2.0 m/s. A man steers a motorboat across the river. The rive...
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